$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-Raw-Lzma.git /var/lib/mock/f40-build-800176-142876/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Lzma
Cloning into '/var/lib/mock/f40-build-800176-142876/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Lzma'...
$ git fetch origin 57bb3cb8a9abc31f949312cd87df0e316d44cd95:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-Raw-Lzma
 * [new ref]         57bb3cb8a9abc31f949312cd87df0e316d44cd95 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57bb3cb Fix xz-libs Epoch